It’s official! America’s favorite names are Charlotteand James. The top names for 2011 in Sweden? Aliceand William. They’re classic appellations, at home across the centuries and in many languages.

They’re also clearly gendered. With apologies to Mr. Cooper, it is difficult to imagine a boy named Alice, and while actor JamesMarsden has a daughter called MaryJames, it is tough to imagine picking Jamesfor a daughter’s first name.

Or is it? At first, it is easy to draw clear lines. Evanis a boy’s name, but Evelynis meant for a girl. Nicolais feminine, of course, while Jordanwas shamelessly stolen from our sons.

While we all have our own impressions, it often turns out that the line is blurry, or even non-existent, for many a name. This week’s top nine illustrate that uncertainty.